---
--- Created by hjg.
--- DateTime: 2025/2/14 8:56
---
local voucherId = ARGV[1]
local userId = ARGV[2]
local orderId = ARGV[3]

local stockKey = 'hmdp:seckill:stock' .. voucherId
local orderKey = 'hmdp:seckill:order' .. voucherId

if tonumber(redis.call('get', stockKey)) <= 0 then
    return 1
end

if redis.call('sismember',orderKey, userId) == 1 then
    return 2
end

redis.call('incrby',stockKey,-1)
redis.call('sadd',orderKey,userId)
redis.call('xadd','stream.orders','*','userId',userId,'voucherId',voucherId,'Id',orderId)
return 0
